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Cesium iodide

Description References

Cesium iodide

CAS No.7789-17-5
Chemical Name:Cesium iodide
CBNumber:CB8471666
Molecular Formula:CsI
Formula Weight:259.81
MOL File:7789-17-5.mol

Cesium iodide Property

Melting point 626 °C (lit.)
Boiling point 1280 °C
Density 4.51 g/mL at 25 °C (lit.)
refractive index 1.7876
Flash point 1280°C
storage temp. Keep in dark place,Inert atmosphere,Room temperature
solubility soluble in ethanol, methanol, acetone
form beads
color White
Specific Gravity 4.51
PH pH(50g/l, 25℃) : 5.0～9.0
Water Solubility 74 g/100 mL (20 ºC)
Sensitive Hygroscopic
Merck 14,2014
Exposure limits ACGIH: TWA 0.01 ppm
Dielectric constant 5.6（Ambient）
Stability Stable. Deliquescent.
CAS DataBase Reference 7789-17-5(CAS DataBase Reference)
EWG's Food Scores 1
FDA UNII U1P3GVC56L
NIST Chemistry Reference Cesium iodide(7789-17-5)
EPA Substance Registry System Cesium iodide (CsI) (7789-17-5)
UNSPSC Code 41116107
NACRES NA.24

Safety

Hazard Codes :Xn,Xi
Risk Statements :36/37/38-42/43-43
Safety Statements :22-36/37-45
RIDADR :UN 3077 9 / PGIII
WGK Germany :2
RTECS :FL0350000
F :8
TSCA :Yes
HS Code :28276000
Toxicity :LD50 i.p. in rats: 1.4 g/kg (Cochran)

NFPA 704:

	1
2		1

Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal wordWarning
Hazard statements H361fd-H400
Precautionary statements P201-P202-P273-P280-P308+P313-P391

Cesium iodide Price More Price(36)

Brand: Sigma-Aldrich(India)
Product number: 429384
Product name : Cesium iodide
Purity: AnhydroBeads?, ?10?mesh, 99.999% trace metals basis
Packaging: 10G
Price: ₹7988.85
Updated: 2022/06/14
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Brand: Sigma-Aldrich(India)
Product number: 21004
Product name : Cesium iodide
Purity: analytical standard, suitable for mass spectrometry (MS)
Packaging: 1G
Price: ₹4340.83
Updated: 2022/06/14
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Brand: Sigma-Aldrich
Product number: 203033
Product name : Cesium iodide
Purity: 99.999% trace metals basis
Packaging: 1G
Price: ₹4730.53
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich(India)
Product number: 203033
Product name : Cesium iodide
Purity: 99.999% trace metals basis
Packaging: 1G
Price: ₹4730.53
Updated: 2022/06/14
Buy: Buy

Brand: Sigma-Aldrich
Product number: 203033
Product name : Cesium iodide
Purity: 99.999% trace metals basis
Packaging: 10G
Price: ₹14202.4
Updated: 2022/06/14
Buy: Buy

Cesium iodide Chemical Properties,Usage,Production

Description Cesium iodide is a soft material and extremely hygroscopic. Cesium iodide scintillators have been used extensively for indirect x-ray imaging detectors, such as for CT examinations. Cesium iodide is also used to construct electromagnetic shower detector for the CLEO II experiment, which investigates electron-positron annihilation at center-of-mass energies near 10 GeV. Cesium iodide is useful for beam splitters for Far IR spectrophotometers and IR transmission windows.
References [1] W. Zhao, G. Ristic, J. A. Rowlands, X-ray imaging performance of structured cesium iodide scintillators, Medical Physics, 2004, vol. 31, 2594-605
[2] E. Blucher, B. Gittelmann, B. K. Heltsley, J. Kandaswamy, R. Kowalewski, Y.Kubota, N. Mistry and S. Stone, Tests of cesium iodide crystals for an electromagnetic calorimeter, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1986, vol. 249, 201-227
[3] M. Völk, O. W. Hamer, S. Feuerbach, M. Strotzer, Dose reduction in skeletal and chest radiography using a large-area flat-panel detector based on amorphous silicon and thallium-doped cesium iodide: technical background, basic image quality parameters, and review of the literature, European Radiology, 2004, vol. 14, 827-834
[4] M. V. Mastryukov. “Preparation of Extrapure Cesium Iodide.” Inorganic Materials 56 10 (2020): 1050–1054.
Chemical Properties white crystalline powder
Uses Cesium iodide (CsI) is a kind of ionic compound that has been widely used as scintillators in many areas such as X-ray image intensifier tubes, photocathodes, and display devices.
Cesium iodide is used in scintillation counters(Geiger counters) to measure levels of external radiation. It is also useful as a "getter" to remove air molecules remaining in vacuum tubes.
Cesium Iodide is a material with high γ-ray stopping power due to its relative high density and atomic number. For scintillation counting, it is used either in its un-doped form or doped with sodium or thallium.
CsI is resistant to thermal and mechanical shock. The physical characteristics of CsI are independent of the activator used. Compared to NaI(Tl), it is relatively soft and plastic, and does not cleave. Because it has no cleavage plane, it is quite rugged-which makes it well-suited for well logging, space research or other applications where severe shock conditions are encountered.
Uses Cesium iodide is used in FT-IR (Fourier Transform Infrared Spectrometers) as a beamsplitter. Cesium Iodide exhibits high gamma-ray stopping power. Useful as input phosphor in fluoroscopy equipment, and efficient photocathode for extreme ultraviolet wavelengths. Fast and dense scintillating material - useful in electromagnetic calorimetry in particle physics.
Uses Prisms for infrared spectroscopy; in x-ray fluorescent screens, scintillation counters.
Production Methods A single crystal can be grown from a melt solution by both the Kyropoulus method and the Stockbarger method.
General Description Cesium iodide is a simple ionic salt. It has the capacity to undergo second order transformation from cubic B2 structure to body-centered tetragonal structure at low pressures. It is mostly used as input screens of X-ray image intensifiers.
Flammability and Explosibility Non flammable
Safety Profile Moderately toxic by ingestion and intraperitoneal routes. See also CESIUM and IODIDES. When heated to decomposition, it emits toxic fumes of I-.
Synthesis The main method for preparing cesium iodide-based single crystals is Kyropoulos growth, which allows one to obtain cylindrical ingots weighing up to several tens of kilograms.
Cs2CO3+ 2HI→2CsI+H2O+CO2↑
Technically, pure CsI was prepared by dissolving cesium carbonate in hydriodic acid at room temperature in a vessel from niobium, which was nonreactive with cesium iodide at elevated temperatures. The solution was heated to boiling at pH 3 to completely dissolve the caesium carbonate because the niobium vessel was unstable in an acid medium.The hot solution was filtered and boiled down at a temperature near 393 K. After crystallization, the material was vacuum-dried in a quartz ampule[4].
Solubility in water Cesium iodide is soluble in water, with a solubility of 44/100 g H2O (0℃ and 160/100 g H2O (61℃). It is soluble in alcohol. One should handle it carefully, because it is deliquescent.
Purification Methods Crystallise it from warm water (1mL/g) by cooling to -5o.
Structure and conformation The space lattice of CsI belongs to the cubic system, and its cesium chloride structure has a lattice constant of a=0.8529 nm.